1 The expected genotype frequencies. 2  The number of heterozygous individuals that you would predict to be in this population. 3  The expected phenotype frequencies. 4  Conditions happen to be really good this year for breeding and next year there are 1,245 young potential Biology instructors.
Freebase(0.00 / 0 votes)Rate this definition: Donkey. The donkey or ass, Equus africanus asinus, is a domesticated member of the Equidae or horse family. The wild ancestor of the donkey is the African wild ass, E. africanus. The donkey has been used as a working animal for at least 5000 years.
The mule is a hybrid cross between a male donkey (jack) and a female horse (mare). Because the mule most often demonstrates the best traits from each parent, he possesses what we call hybrid vigor. mule gets its athletic ability from the horse and its intelligence from the donkey. Donkeys and mules have been labeled âstubbornâ for centuries, but it is really only an abundance of common sense and a strong desire for self-preservation that might make them inclined to resist.